Mixing-machine.



G. M. STEDMAN MIXING MACHINE. APPLICATION FILED AUG.29.1912v 3 SHEETS-SHEET 1.

nuentoz Patented Sept. 30, 1913.

M; STEDMAN. MIXING MAGHINB. APPLICATION FILED AUG.29.1912.

1 074 388 Patented Sept. 30, 1913.

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8 vlvenlfoz Wi themes G. M. STBDMAN.

MIXING MACHINE.

APPLICATION FILED AUG. 29, 1912.

Patented Sept. 30, 1913.

3 SHEETS-SHEET 3.

9 36 fSkr/m 011/ wdmcooco f/ I Z" UNITED STATES PATENT orrrcn.

' enonen m. STEDMAN, or aunona, INDIANA.

MIXING-MACHINE.

To allwhom it, may eoncemi. -Beit known that I, GEOIiGE M. STEDMAN, a citizen of the United States of America, and a resident. of Aurora, in they county of Dearborn and State of- Indiana, have invented certain new and useful Im rovementsin Mixing-Machines, of e 01,

lowing is a specification.

My invention relates to mixing machines, such as are used for mixing concrete or other granular or fibrous materials, and consists in the improvements to the rotary batch mixture illustrated in .the accompanying drawing, in which Figure 1 is a side elevation, a part being .broken away and a part in section, of the ,mixer. Fig. 2 is an end view of the same, Fig. 3 is' a vertical section through the discharge end of the mixer, Fig. 4 is a similar section of a modified.construction,-and Fig. 5 is an end view of Fig.4.

One of the objects of my invention is to so construct and mount the mixing blades within the rotary cylinder that they may be easily and quickly adjusted to stand at any desired angle, so as to advance the material being mixed through the machine more or less rapidly.

' Another object of my invention is to provide an improved door or closing means for the dischargeend of the cylinder, which can he qpenedpr retracted, whenever it is desired to discharge the batch, without/stop ping the rotation of the cylinder.

35 In the drawings, 1 represents the cylinder,

which is not actually truly cylindrical in shape but increases in diameter slightly toward the discharge end, and 2 the hopper from which the material is fed into the cylinder. The small end of the hopper is closed by a gate-valve, pivoted at 3 and held in its closing position by a wedge 4. Asthis gatevalve forms no part of my present invention, I will not need to describe it here in detail.

The cylinder 1 is supported as usual by bearing rings 5, 5, running on rollers 6, 6, and is rotated by means of the pinion 7, meshing with the annular rack 8 and driven from pulley 9. On the inside periphery of the cylinder are mounted the mixing blades, consisting of angle-irons 10, bolted to supporting bars 11, spaced away from the wall of the cylinder by their bent ends 12, which are rigidly secured to said wall. It will be apparent that, by loosening the said bolts, the blades 10 can be adjusted to any desired Specification of Letters Patent.

PatentedSept. 30, 1913.

V g Application filed August 29, 1912. Serial No. 717,683.

I 1 angle. The rear. end of the cylinder is inclosed. by a sheet-metal hood 13, as shown, and is provided, with a head, which may take the form shown in Figs. 1,2 and 3, or the form shown in, Figs. 4 and5.

In the first form, the cylinder is closed at its di charge end by. a head 14; provided with a lurali (here shown as six) of sub- Tstantia y rectangular discharge openings 15, each extending radially from the inner periphery of the cylinder for a distance approximately equal to one-half the radius of the same. While a batch is being mixed, the said openings are closed by a plate 16, slidably mounted on a stub-shaft 17 projecting from the cylinder end 14, and guided on bolts 18, likewise carried ,by said end. The plate 16, which of course is solid, is slid on said shaft and bolts by means of a sliding collar 19, keyed on saidshaft and connected to said plate by links 20. In a groove in said collar is rotatably mounteda yoke 21, provided with laterally projecting pins 22, engaging in slots in the forked arms of a lever 23, carried by a shaft 24, journaled on the base of themachine. A hand-lever 25 is also secured to said shaft and is carried through to the front of the machine for convenience -in operation. It now be obvious that the plate 16 can he slid back and forth, into or out of enga ment with the perforated head of the cylinder, by merely raising or lowering the end of-said hand-lever 25, the weight of which normally keeps the plate in enga ement with the head. When the batch is su ciently mixed, the plate 16 is slid back and the batch falls out of the openings 15. In the other form of the machine, illustrated in Figs. 4 and 5, the cylinder end is closed as before by a plate 14, having the openings 15 therein but, instead of the solid sliding plate, I pivotally mount doors 26 on said plate, each of which is adapted to close one of said openings. These doors are actuated by similar means to the plate 16, that is by a sliding collar 27, with its yoke 28, forked lever 29, shaft 30 and hand-lever 31, the

links 32, 33, the latter being also connected by links 34 to the head 14, thus forming a system of toggle-levers. The operation of this form of closure will be obvious without further description.

It will be seen that, by the constructions described, I have provided a convenient and eflicient form of continuous rotary batch same and spaced away from its inner wall,

and mixing blades centrally bolted to said bars, whereby said blades can be adjusted to vstand at any desired angle.

2. In a machine of the class described, a rotary shell having its discharge end closed by an apertured head, doors pivoted to said head in position to close said apertures, a stub-shaft projecting outwardly from the center of said head, a collar slidable on said shaft, ayoke lever rotatably engaging said 15' collar, means to rock said lever, links pivoted to said collar, other links connecting said doors to said first-mentioned links, and a third set oflinks pivoted to said head and to said connecting links, scribed.

Signed at Aurora, Ind., this 26th day of August, 1912. v

GEORGE M. STEDMAN. Witnesses:

JOHN DEAN, SILAS D. DEAN.

substantially as de- 20 v 

